灌注桩PIT检测中反射波异常信号的成因分析与判别  

Analysis and Judgment on Cause for Abnormal Signal of Reflected Wave in PIT Test of Driven Cast-in-place Pile

作　　者：寇磊[1] 韩彦丰[1] 

机构地区：[1]中交第一航务工程勘察设计院有限公司,天津300222

出　　处：《港工技术》2013年第2期48-49,52,共3页Port Engineering Technology

摘　　要：在灌注桩的PIT检测中,经常会因灌注桩顶部桩体存在质量问题而出现反射波信号异常的情况,以致影响对桩身完整性的判别。根据某工程项目基桩PIT检测实践,分析灌注桩顶部典型缺陷的成因,总结与之对应的异常波形,并与现场开挖后波形异常灌注桩的实际情况进行对比,以验证桩身质量判别结论的准确性。In PIT test, abnormal reflected wave signal is often caused by the quality defect of pile body on top of the driven cast-in-place pile, which even influences the judgment on pile integrity. PIT test result of Pile foundation one project is analyzed to find the cause for classic defect on top of driven cast-in-place pile, sum up the corresponding abnormal waveform, and compare with the driven east-in-place pile with abnormal waveform after field excavation, which may verify the correctness of pile quality judgment theory.

关 键 词：低应变检测 桩身质量判别 反射波信号 异常波形 现场开挖验证 

分 类 号：TU473[建筑科学—结构工程]